package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/*自定义切面类*/
@Aspect
@Component
@Slf4j
public class AuotFillAspect {
    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {

    }
    //前置通知，为公共字段赋值
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始进行公共字段自动填充");

        //获取当前方法操作类型
        MethodSignature methodSignature = (MethodSignature)joinPoint.getSignature();//获取方法签名
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);//获取注解对象
        OperationType operationType = autoFill.value();//获取操作类型

        //获取当前方法参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0){
            return;
        }
        Object arg =args[0];

        //准备赋值数据
        LocalDateTime  now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //反射赋值
        if (operationType == OperationType.INSERT){
            //设置创建时间、创建人、更新时间、更新人
            Method  setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
            Method  setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
            Method  setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
            Method  setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);
            setCreateTime.invoke(arg,now);
            setCreateUser.invoke(arg,currentId);
            setUpdateTime.invoke(arg,now);
            setUpdateUser.invoke(arg,currentId);
        } else if(operationType == OperationType.UPDATE){
            //设置更新时间、更新人
            Method  setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
            Method  setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);
            setUpdateUser.invoke(arg,currentId);
            setUpdateTime.invoke(arg,now);
        }
    }

}
